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Dielectric properties of cobalt substituted M-type barium hexaferrite prepared by co-precipitation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shepherd, Philip L. Mallick, Kajal K. Green, Roger J. |
| Copyright Year | 2007 |
| Abstract | Barium hexaferrite was synthesised via the co-precipitation method using high purity nitrates, oxides and carbonates of iron (III), barium (II) and ammonium hydroxide. Once a phase pure sample of barium hexaferrite was obtained, it was doped, by weight, with 1, 2, 3, 5, 10, 15, 20 and 30% cobalt oxide (Co3O4). The addition of cobalt to the BaM had the effect of reducing the permittivity and loss tangent until a doping of 10% whereupon it remained constant at around 9. Thermogravimetric (TG) studies of green bodies showed decarboxilation to occur at around 825°C and the transformation of residual Co3O4 to Co2O3 at around 900°C. The X-ray diffraction (XRD) studies confirmed the Co ions substituting in the iron sites until a doping level, of 10–15% where the structure underwent a transition to one more closely resembling the W-type hexaferrite. The measured densities were found to vary with doping levels, with a maximum of 4.45 g/cm3 at 1% Co doping. |
| Starting Page | 527 |
| Ending Page | 534 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s10854-006-9059-6 |
| Volume Number | 18 |
| Alternate Webpage(s) | https://warwick.ac.uk/fac/sci/wmg/about/people/profiles/kkm/dielectric_properties_of_cobalt_substituted_mtype_barium.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s10854-006-9059-6 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
